SAFE AND PREMIUM MATERIAL - Our thumb suction cups are made of food-grade silicone material, reliable and durable, can be used within one month, and 100% non-toxic for babies.There are no metal parts in the product to avoid accidental harm to the baby.The hardness of the thumb guard is also soft enough to ensure that it does not affect the growth of deciduous teeth, but breaks the habit of biting the thumb.Ergonomic design for kids and babies - This adjustable thumb sucking set is designed for children aged 3-36 months to break the thumb sucking habit in a natural and comfortable way.The suction thumb rest is designed with an adjustable wrist strap to accommodate wrist widths from 1.95 inches to 1.5 inches. Tightening the wrist strap also ensures that the thumb guard doesn't come off too easily.REUSABLE AND DURABLE - If you're wondering how to keep your thumb suction cups clean and hygienic for next time, you can sterilize your thumb suction cups in boiling water.Our products are made of high-quality silicone and can withstand temperatures up to 180 degrees Celsius, ensuring no harmful bacteria remain on the product. It is recommended to clean the thumb plug at least once a day.Effective in breaking bad habits - We recommend using this finger sucking eliminater for at least 4 weeks for up to 95% success rate.Our product is required 24/7, but it is best to remove it at night to keep the thumb pump treatment kit clean for the next day.It is important for children to break the habit of thumb sucking, as it can not only injure their fingers but also affect the growth of their teeth.You can sterilize thumb guards in boiling water. Our products are made of high-quality silicone and can withstand temperatures up to 180 degrees Celsius, ensuring no harmful bacteria remain on the product.